EP1709334B1 - Accumulateur de pression, en particulier amortisseur de pulsations - Google Patents

Accumulateur de pression, en particulier amortisseur de pulsations Download PDF

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Publication number
EP1709334B1
EP1709334B1 EP05700985A EP05700985A EP1709334B1 EP 1709334 B1 EP1709334 B1 EP 1709334B1 EP 05700985 A EP05700985 A EP 05700985A EP 05700985 A EP05700985 A EP 05700985A EP 1709334 B1 EP1709334 B1 EP 1709334B1
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EP
European Patent Office
Prior art keywords
fluid
piston
gas
working
pressure
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP05700985A
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German (de)
English (en)
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EP1709334A1 (fr
Inventor
Herbert Baltes
Markus Lehnert
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hydac Technology GmbH
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Hydac Technology GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hydac Technology GmbH filed Critical Hydac Technology GmbH
Publication of EP1709334A1 publication Critical patent/EP1709334A1/fr
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Publication of EP1709334B1 publication Critical patent/EP1709334B1/fr
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
    • F15B1/02—Installations or systems with accumulators
    • F15B1/04—Accumulators
    • F15B1/08—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor
    • F15B1/10—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor with flexible separating means
    • F15B1/103—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor with flexible separating means the separating means being bellows
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
    • F15B1/02—Installations or systems with accumulators
    • F15B1/04—Accumulators
    • F15B1/08—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor
    • F15B1/22—Liquid port constructions
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2201/00—Accumulators
    • F15B2201/20—Accumulator cushioning means
    • F15B2201/205—Accumulator cushioning means using gas
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2201/00—Accumulators
    • F15B2201/30—Accumulator separating means
    • F15B2201/31—Accumulator separating means having rigid separating means, e.g. pistons
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2201/00—Accumulators
    • F15B2201/30—Accumulator separating means
    • F15B2201/315—Accumulator separating means having flexible separating means
    • F15B2201/3153—Accumulator separating means having flexible separating means the flexible separating means being bellows
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2201/00—Accumulators
    • F15B2201/30—Accumulator separating means
    • F15B2201/32—Accumulator separating means having multiple separating means, e.g. with an auxiliary piston sliding within a main piston, multiple membranes or combinations thereof
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2201/00—Accumulators
    • F15B2201/40—Constructional details of accumulators not otherwise provided for
    • F15B2201/41—Liquid ports
    • F15B2201/413—Liquid ports having multiple liquid ports
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2201/00—Accumulators
    • F15B2201/40—Constructional details of accumulators not otherwise provided for
    • F15B2201/415—Gas ports

Definitions

  • the invention relates to a pressure accumulator, in particular pulsation damper, according to the feature configuration of the preamble of claim 1.
  • WO 01/55602 A1 are known so-called hydropneumatic pressure accumulator, with a within the storage housing a gas space of an oil space separating bellows, in particular in the form of a metal bellows, which is attached at its one end to the storage housing so that the oil space adjacent to the inside of the bellows, at its free other end is closed by a corresponding volume changes of gas space and oil space as the two working spaces of the memory movable closure body, and with a flow of Hydraulikfluidum from and into the oil chamber releasing or blocking valve, which in a movement of the closure body, the one corresponds to predetermined maximum value increasing the volume of the gas space through which the closure body can be transferred to its blocking position, wherein the closure body is in the form of a trough, the bottom of which is designed as a movable valve member of the hydraulic fluid flow controlling valve.
  • a valve tappet fastened to the bottom of the trough which extends concentrically with the longitudinal axis from the storage housing and is connected to a second movable valve member, which at a predetermined minimum value of the volume of the gas space excess movement of the trough with a flow of Hydraulikfluidum in the oil space locking, second valve seat cooperates, so that there is the advantageous possibility to control the smallest value of the volume of the gas space corresponding end position of the trough with the aid of an oil-side valve.
  • the storage housing can be shaped so that it forms a mechanical stop after a short stroke movement of the trough, because the entire interior of the trough is available as a gas volume space, and so far the metal bellows is protected as a whole not only against overstretching but, since it surrounds the outside of said trough, the bellows is also mechanically supported on the outside of the trough over the entire length in the gas space prevailing overpressure.
  • the known solution relates in particular to a pulsation damper with a storage housing and a piston part arranged therein, wherein a bellows-type separating member is supported with its one end on the piston part and with its other end on the storage housing, wherein the separating member two working spaces, in particular a gas space, from a fluid space within the storage enclosure fluid-tight, in particular gas-tight, separated from each other, and wherein the one working space is filled in addition to a predetermined volume fraction of a working gas with a fluid.
  • the bias pressure generating pressure medium preferably consists of nitrogen gas, which is provided in the known solution as a fluid with an oil reservoir with a predetermined volume fraction.
  • the present invention seeks to further improve the known accumulator solutions while maintaining their advantages that in a very small space a high degree of damping with respect to the pulsations of Hydraulikfluidum including fuel, such as diesel fuel further fluid is achieved in the fluid space of the pressure accumulator, with simultaneous realization of an effective protection for each fold or deflection of the bellows, in order to ensure the functionally reliable operation over a very long cycle times with a variety of changing load cycles.
  • This object is achieved by a pressure accumulator with the features of claim 1 in its entirety.
  • the fluid with which a working space is filled with the working gas is an alcohol
  • a fluid is used, which can flow as a highly fluid medium very quickly within the working space with the working gas and in particular the alcohol is suitable, in the range of design temperature for the accumulator, for example, from -10 ° C to + 160 ° C to fulfill its intended task.
  • the fluid filling with the alcohol that little working gas within the fluid gets into solution, so that the effective volume fraction of working gas for the pressure shock absorption is not unnecessarily reduced.
  • the alcohol can be displaced into the working space with the other working gas and also retrieved from there back into the spaces between the folds for Abstützvorlandais.
  • a combination of nitrogen gas as the working gas and ethylene alcohol as the fluid on the gas side of the reservoir has proved to be particularly advantageous as a fluid filling.
  • the volume proportions of working gas and fluid are chosen to be the same or, preferably, slightly more fluid than working gas is present in said working space of the pressure accumulator.
  • the gas space is filled with fluid substantially.
  • Fluid fillable cavity can be provided so that on the fluid side of the memory the capacity for Hydraulikfluidum including fuels is increased, so as to improve the efficiency of the pressure accumulator for the pulsation damping, taking such a different way than in the previously known solutions in which an attempt has been made to improve the working capacity of the store to the effect that you put the provided cavity of the piston part on the side of the working space with the working gas (see. WO 01/55602 A1 ). It is surprising for a person of ordinary skill in the art of pressure accumulators that he by reversing this effect principle with reduced gas content with simultaneous filling With a fluid on the gas side of the accumulator to improved damping values for the fluid entering the memory comes, while achieving increased reliability. Since the pertinent storage solution for the movable parts requires no additional seals, a prerequisite for a wear-free, permanent operation is also given in this respect.
  • the single FIGURE shows a longitudinal section of said embodiment of the pressure accumulator.
  • the illustrated embodiment of a pressure accumulator is provided in particular for use in fuel and heavy oil systems, in order to dampen and smooth pressure surges of the pertinent operating medium.
  • a pertinent accumulator could also be used in electro-hydraulic brake systems, for example in vehicle use.
  • the accumulator shown has a designated as a whole with 10 storage enclosure, with a substantially circular cylindrical, pot-shaped body 12.
  • the main part 12 has seen in the direction of the figure above a lid part 14, which connects via a screw 16 with the cup-shaped body 12 is, and a sealant in the form of a sealing ring 18 is the interior the storage enclosure 10 sealingly sealed off from the environment.
  • the cover member 14 may be provided with a material recess 20, and along the longitudinal axis 22 of the memory, the lid member 14 is penetrated by a closure screw 24, after its removal via a suitable device (not shown) working gas, for example in the form of Nitrogen gas and / or a fluid, for example in the form of ethylene glycol in the one working chamber 26 of the pressure accumulator bring, which is usually referred to in the conventional storage only as a gas space.
  • a suitable device not shown working gas
  • a suitable device for example in the form of Nitrogen gas and / or a fluid, for example in the form of ethylene glycol in the one working chamber 26 of the pressure accumulator bring, which is usually referred to in the conventional storage only as a gas space.
  • piston member 28 is disposed axially longitudinally displaceable along the longitudinal axis 22 of the memory.
  • a bellows-like partition member 30 extends along the outer peripheral side of the piston member 28 and is supported at one end 32 on the piston member 28 and with its other end 34 on a downwardly projecting, annular extension 36 of the cover member 14 from.
  • the separating member 30 is preferably formed in the manner of a metal bellows, with a plurality of annular individual folds 38 or deflections, which engage over the cylindrical piston part 28 on the outer circumference side in a zigzag-shaped manner in the manner of a pleating with a predeterminable distance.
  • the piston part 28 separates the also referred to as the gas chamber a working space 26 of a further second working space 40 from a fluid-tight, which is referred to as a fluid chamber at this pressure accumulators.
  • the annular extension 36 of the cover part 14, which is to be regarded in this respect as part of the storage housing 10, has on its inside a cylindrical guide surface 42 within which the upper end of the piston member 28 longitudinally movable while maintaining a radial distance in the kind of an annular gap 44 is guided. Furthermore, the storage housing 10 seen in the direction of the figure on its underside a cylindrical connecting piece 46, with two fluid ports 48, 50 which open into a common antechamber 52 within the connecting piece 46.
  • the fluid guide is made in such a way.
  • the piston part 28 has a cylindrical cavity 56 which essentially fills it up to a reduced wall thickness for the piston part 28.
  • the piston member 28 In the region of the connection between bellows-type separating member 30 with the piston member 28 at its one end 32, the piston member 28 an annular widening stop 58, for abutment with the associated, adjacent inner wall 60 of the storage housing 10, in which the antechamber 52 of the connecting piece 46 opens ,
  • the piston member 28 is further at its end opposite the stop 58 with a stop surface 62nd extending transversely to the longitudinal axis 22 of the memory extending, which serves to abut against a further opposite inner wall 64 of the storage housing 10, preferably formed by the cover part 14.
  • the pertinent working space 26 is filled with a working gas, for example nitrogen gas, which absorbs the pressure surges in the sense of smoothing or damping, which are introduced into the latter on the fluid side 40 of the reservoir.
  • a working gas for example nitrogen gas
  • Any heating occurring in the region of the metal bellows as a bellows-type separating member 30 can likewise be achieved well with the fluid introduced into the working space 26, in particular dominate in the form of ethylene glycol, which in the rest as a low-viscosity medium has a good inflow and outflow behavior and further dissolves little working gas, which is necessary for the damping behavior of the memory.
  • an insert for a rubber bellows is intended as a bellows-type separating member 30.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
  • Pipe Accessories (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)

Claims (10)

  1. Accumulateur de pression, notamment amortisseur de pulsations, comprenant un carter d'accumulateur (10) et, agencée dans celui-ci, une pièce de piston (28), un organe de séparation (30) en forme de soufflet s'appuyant par l'une (32) de ses extrémités, sur la pièce de piston (28), et par son autre extrémité (34), sur le carter d'accumulateur (10), l'organe de séparation (30) séparant de manière étanche aux fluides, notamment de manière étanche aux gaz, deux chambres de travail (26, 40), notamment une chambre de gaz (26) d'une chambre de fluide (40) à l'intérieur du carter d'accumulateur (10), et ladite une chambre de travail (26) étant, outre d'une part de volume prédéterminée d'un gaz de travail, remplie d'un fluide, caractérisé en ce que le fluide dont est remplie ladite une chambre de travail (26) comprenant le gaz de travail, est un alcool.
  2. Accumulateur de pression selon la revendication 1, caractérisé en ce que l'alcool est de l'éthylène glycol.
  3. Accumulateur de pression selon la revendication 2, caractérisé en ce que l'autre chambre de travail (40) est pourvue de raccords de fluide (48, 50) par l'intermédiaire desquels un autre fluide, notamment sous la forme de carburant Diesel ou d'huile lourde, peut être amené à l'intérieur du carter d'accumulateur (10).
  4. Accumulateur de pression selon la revendication 3, caractérisé en ce que la pièce de piston (28) a, du côté dirigé vers l'autre chambre de travail (40), une cavité (56) qui est prévue pour recevoir l'autre fluide.
  5. Accumulateur de pression selon l'une des revendications 1 à 4, caractérisé en ce que la pièce de piston (28) est guidée de manière mobile, au moins sur une partie de son parcours de déplacement possible, avec un espacement radial prédéterminé, le long de parties (42) du carter d'accumulateur (10), de préférence dans la partie de couvercle (14) de celui-ci.
  6. Accumulateur de pression selon l'une des revendications 3 à 5, caractérisé en ce que la pièce de piston (28) est pourvue, du côté dirigé vers le raccord de fluide (48, 50), d'une butée (58) destinée à venir buter sur une paroi intérieure (60) du carter d'accumulateur (10).
  7. Accumulateur de pression selon la revendication 6, caractérisé en ce que la pièce de piston (28) est pourvue, à son extrémité opposée à la butée (58), d'une surface de butée (62) destinée à venir buter sur une autre paroi intérieure (64) du carter d'accumulateur (10), de préférence formée par la partie de couvercle (14) de celui-ci.
  8. Accumulateur de pression selon l'une des revendications 1 à 7, caractérisé en ce que l'organe de séparation (30) est formé par un soufflet métallique comprenant un grand nombre de plis individuels (38) agencés côte à côte, les uns au-dessus des autres.
  9. Accumulateur de pression selon l'une des revendications 3 à 8, caractérisé en ce que les raccords de fluide (48, 50) s'étendent à l'intérieur d'un embout de raccordement (46) du carter d'accumulateur (10) et débouchent, à l'intérieur de cet embout de raccord (46), dans une chambre primaire (52) commune de celui-ci.
  10. Accumulateur de pression selon l'une des revendications 5 à 9, caractérisé en ce que la pièce de piston (28), au moins le long d'une partie de son parcours de déplacement possible, délimite un interstice annulaire (44) formant l'espacement radial, par l'intermédiaire duquel le gaz de travail avec ledit un fluide, parvient sur le côté intérieur de l'organe de séparation (30) en forme de soufflet.
EP05700985A 2004-01-29 2005-01-18 Accumulateur de pression, en particulier amortisseur de pulsations Active EP1709334B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004004341A DE102004004341A1 (de) 2004-01-29 2004-01-29 Druckspeicher, insbesondere Pulsationsdämpfer
PCT/EP2005/000410 WO2005073564A1 (fr) 2004-01-29 2005-01-18 Accumulateur de pression, en particulier amortisseur de pulsations

Publications (2)

Publication Number Publication Date
EP1709334A1 EP1709334A1 (fr) 2006-10-11
EP1709334B1 true EP1709334B1 (fr) 2007-10-31

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ID=34801157

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05700985A Active EP1709334B1 (fr) 2004-01-29 2005-01-18 Accumulateur de pression, en particulier amortisseur de pulsations

Country Status (7)

Country Link
US (1) US7857006B2 (fr)
EP (1) EP1709334B1 (fr)
JP (1) JP5059414B2 (fr)
AT (1) ATE377156T1 (fr)
DE (2) DE102004004341A1 (fr)
DK (1) DK1709334T3 (fr)
WO (1) WO2005073564A1 (fr)

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Publication number Priority date Publication date Assignee Title
DE102014001283A1 (de) 2014-02-01 2015-08-06 Hydac Technology Gmbh Druckspeicher

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DE102006008175A1 (de) 2006-02-22 2007-08-23 Hydac Technology Gmbh Druckspeicher, insbesondere Pulsationsdämpfer
DE102007003724A1 (de) * 2007-01-25 2008-07-31 Hydac Technology Gmbh Druckbehälter, insbesondere Hydrospeicher
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WO2011079851A1 (fr) 2009-12-30 2011-07-07 Hydac Technology Gmbh Dispositif de guidage pour soufflet métallique
EP2519748B1 (fr) * 2009-12-30 2016-10-19 Hydac Technology Gmbh Accumulateur de pression, en particulier accumulateur à soufflet
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US8656959B2 (en) 2011-09-23 2014-02-25 GM Global Technology Operations LLC Hydraulic accumulator
DE102011117533B4 (de) * 2011-11-03 2020-10-08 Woodward L'orange Gmbh Druckspeicher sowie Kraftstoffeinspritzeinrichtung mit einem solchen
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WO2016194609A1 (fr) * 2015-05-29 2016-12-08 イーグル工業株式会社 Accumulateur de type à soufflet métallique
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014001283A1 (de) 2014-02-01 2015-08-06 Hydac Technology Gmbh Druckspeicher

Also Published As

Publication number Publication date
EP1709334A1 (fr) 2006-10-11
DE102004004341A1 (de) 2005-08-18
JP5059414B2 (ja) 2012-10-24
WO2005073564A1 (fr) 2005-08-11
DE502005001823D1 (de) 2007-12-13
DK1709334T3 (da) 2008-03-17
ATE377156T1 (de) 2007-11-15
JP2007519869A (ja) 2007-07-19
US7857006B2 (en) 2010-12-28
US20090101222A1 (en) 2009-04-23

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